Photographic film.



F. W. LOVEJOY. PHOTUGRAPHIG FILM. APPLICATION FILED ocnu. ma.

1 ,2 1 3,5 1 4 b Patented Jan. 23, 1917 UNITED STATES PATENT OFFICE.

FRANK W. LOVE-TOY, OF ROCHESTER. NEW XORK, ASSIGNOR TO EASTMAN ZKOD AKCOMPANY. OF ROCHESTER. NEW YORK, A CORPORATION OF NEW YORK.

PHOTOGRAPHIQ FILM.

To all whom it may concern:

following to he a full.

Be it known that l. l mmt \V. Lon-1.101,

Rochester in the count of Monroe and N State of New York. have inventedcertain new and useful improvements in Photographic Films; and I dohereby declare the clear. and exact d eserlptlon of the sauna referencebeing had to the accom )anvind drawings. torinin a nrrt of thisspecification, and to the reterenccnumerals marked thereon.

My present invention relates to photos raphy and moreparticular-ivto themanu facture of photographic films. and it has for its object to providca film strip comprising a plurality of picture areas adapted to rcccivea series of successive exposures as in an ordinarv filn cartridge whichstrip will be so constituted that an particular picture area or anyparticular one of a number oi successive exposures may he readilyidenti-- fied-at any point in the exposure. development or printing ofthe negatives. It is further sought to provide identifying marks of sucha nature and so arranged that they will not restrict the exposure areasin any Wav and will be adapted to he, formed or embodied n the filmstrip in connection with or without greatlx altering or adding to theusual operations of maaufiietnre.

To these and other ends the invention consists in certain improvementsand combinations ofparts all as will be hereinafter more fullydescribed. the novel features being pointed out in the claim at the endof the specification.

In the drawings: Figure 1 is a perspective view of an exposed filmcartridge partly unrolledand embodying a film strip constructed inaccordance with and illustrating one enibodiment of my invention: Fig. 2is a fragmentary section taken substantially on the line 22 of Fig. l.and Fig. i is a face view of a portion of the strip and of one of thepicture areas thereon after development of the negative.

S1m1lar reference numerals throughout the several figures indicatethesamel parts.

As before indicated, the invention is applicable to the ordinary filmcartridge now m use and which comprises generally a smol or reel 1 uponwhich is wound a con tmuous strip of sensitized translucent fi 111 2 anda super-imposed coincident stri of Specification ofltetters Patelit.

Application fllfid. otitObCl 27, 1913.

black or other non-actinic paper 3 which protects the lihn from light;moisture and other influences. The hacking strip 3 has indicateddivisions defined by transverse lines or other marksi at intervals andsuccessively numhered as at 5. the said divisions correqmndin'g tocoincident picture areas on the iilm beneath and i ulicatci-l at (i inFig. 3. lhe numhers ii on the hacking ideutifv the correct positions ofthe successive areas ,on' the film in the focal plane of the cameraduring exposure. as is common knowledge, and also the serial position ofthe exposure with reference to the capacity of the stri or cartridge.while the marks 4 on the backing indicate the points at which thesuccessive exposures or neuatives are to he severed to separate them.from each other, as indirated hv the lotted lines 7. But with the merestructure so'far described. there is no means of later identitvine' aparticular picture area or exposure after-the hacking and strip haveheen severed and after the hackin; has been separated from the strip orfrom the separate negatires into which it has been cut.

in the practice of my present invention, I place upon the film strip 2itself an if1separahle distinguishing mark arranged opposite andindividual to each picture area. lhis mark I place centrally on thenarrow edge portion 01" the strip which does not come within the lieldof exposure and forms a sort of a border around the negative. beingcomprised between the picture area (i and the extreme ma rgrin ot'thestrip. Further, I prefer to create the marks hv forming upprotnherances S from the material of the 1 strip itself with a suita ilepunch or otherwise as clearly shown in Fig. :3. There is a group of suchprotulwrances in each mark and the numerical constituent-v of each groupindicates the serial position on the strip and hence the order ofexposure in the camera of the picture area with which that particularmark is associated. Thus there will he one protulwranee in the markopposite the first picture area: two in the mark opposite the second:three inthe mark opposite the third, and so on. In theillustration, thefilm cartridge shown is of sisi exposure capacity. The first fourexposures having been outermost on the unexposed or charged roll, areinnermost 0n the transfer or exposed roll which is the roll shown andhence exposures 6 and 5 come off first in the order named, as appears inthe drawing.

The punch marks are arranged in a line, as she, 'n, and as the dimensionof each protuberance is practically negligible, the mark as a wholetakes up very little room and yet can be easily and quickly read by thephotographer. Also, as they are arranged in a single line, they may bereadily formed by a rotary or other punch as the strip is fed alongeither in connection with some regular operation of its manufacture oras a separate operation. Each picture area, whether in the strip orlater as a separate negative, is thus capable of instant identificationas to which of the series of exposures it records at all times andindependently of the backing strip, the presence of which for thispurpose is not required except in the camera during the taking of thepictures.

I claim as my invention:

A continuous strip of photographic film {ormed in a single integralpiece and comprising a plurality of adjoining picture areas adapted toreceive a series of successive exposures, one of the longitudinal edgesof the film being provided 'with a plurality of distinguishing marks,one of which is op-- posite and individual to each picture area andarranged between said area and the margin of the strip, the marks beingconstituted by protuherances formed up from the material of the film andsuccessive marks consisting of numerically successive of protuherances,all and parallel with the longitudinal edge of groups arranged inalinemeut

